diff --git a/dbt/adapters/impala/connections.py b/dbt/adapters/impala/connections.py
index 4c301e5..60bed61 100644
--- a/dbt/adapters/impala/connections.py
+++ b/dbt/adapters/impala/connections.py
@@ -329,7 +329,8 @@ def add_query(
 
             # re-raise query exception so that it propogates to dbt
             if (query_exception):
-                raise query_exception
+                if (sql.find("invalidate metadata") < 0): # ignore errors for invalidate metadata
+                    raise query_exception
 
             fire_event(
                 SQLQueryStatus(
diff --git a/dbt/include/impala/macros/adapters.sql b/dbt/include/impala/macros/adapters.sql
index 501ec31..1258a90 100644
--- a/dbt/include/impala/macros/adapters.sql
+++ b/dbt/include/impala/macros/adapters.sql
@@ -206,6 +206,7 @@
   {% call statement('drop_relation_if_exists_view') %}
     drop view if exists {{ relation }}
   {% endcall %}
+  {{ invalidate_metadata(relation) }}
 {% endmacro %}
 
 {% macro is_relation_present(relation) -%}
@@ -248,6 +249,12 @@
   {% do return(rel_type) %}
 {% endmacro %}
 
+{% macro invalidate_metadata(relation) %}
+    {% call statement('invalidate_metadata') %}
+        invalidate metadata {{ relation.include(schema=True) }}
+    {% endcall %}
+{% endmacro %}
+
 {% macro impala__rename_relation(from_relation, to_relation) -%}
   {% set from_rel_type = get_relation_type(from_relation) %}
   
@@ -255,8 +262,12 @@
     drop table if exists {{ to_relation }}
   {% endcall %}
   {% call statement('drop_relation_if_exists_view') %}
-    drop view if exists {{ to_relation }};
+    drop view if exists {{ to_relation }}
   {% endcall %}
+  
+  {{ invalidate_metadata(to_relation) }}
+  {{ invalidate_metadata(from_relation) }}
+
   {% call statement('rename_relation') -%}
     {% if not from_rel_type %}
       {% do exceptions.raise_database_error("Cannot rename a relation with a blank type: " ~ from_relation.identifier) %}
diff --git a/dbt/include/impala/macros/incremental.sql b/dbt/include/impala/macros/incremental.sql
index 436432f..a09d893 100644
--- a/dbt/include/impala/macros/incremental.sql
+++ b/dbt/include/impala/macros/incremental.sql
@@ -111,6 +111,7 @@
       {% do to_drop.append(backup_relation) %}
       {% do to_drop.append(intermediate_relation) %}
   {% else %}
+    {{ drop_relation_if_exists(tmp_relation) }}
     {% do run_query(create_table_as(True, tmp_relation, sql)) %}
     {% do adapter.expand_target_column_types(
              from_relation=tmp_relation,
@@ -125,6 +126,8 @@
     {#-- set build_sql = get_delete_insert_merge_sql(target_relation, tmp_relation, unique_key, dest_columns) --#}
 
     {% set build_sql = get_insert_overwrite_sql(target_relation, tmp_relation, dest_columns) %}
+
+    {% do to_drop.append(tmp_relation) %}
   
   {% endif %}
 
@@ -133,7 +136,9 @@
   {% endcall %}
 
   {% if need_swap %} 
+      {{ drop_relation_if_exists(backup_relation) }}
       {% do adapter.rename_relation(target_relation, backup_relation) %} 
+      {{ drop_relation_if_exists(target_relation) }}
       {% do adapter.rename_relation(intermediate_relation, target_relation) %} 
   {% endif %}
 
@@ -149,7 +154,7 @@
   {% do adapter.commit() %}
 
   {% for rel in to_drop %}
-      {% do adapter.drop_relation(rel) %}
+      {{ drop_relation_if_exists(rel) }}
   {% endfor %}
 
   {{ run_hooks(post_hooks, inside_transaction=False) }}